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target/s390x: Diagnose specification exception for atomics

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All of the interlocked access facility instructions raise a
specification exception for unaligned accesses.  Do this by
using the (previously unused) unaligned_access hook.

Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2017-03-02 13:06:18 +11:00
parent 190b2422e6
commit 44977a8fe7
3 changed files with 20 additions and 0 deletions
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16
target/s390x/helper.c
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@ -718,4 +718,20 @@ void s390x_cpu_debug_excp_handler(CPUState *cs)
cpu_loop_exit_noexc(cs);
}
}
/* Unaligned accesses are only diagnosed with MO_ALIGN. At the moment,
this is only for the atomic operations, for which we want to raise a
specification exception. */
void s390x_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
MMUAccessType access_type,
int mmu_idx, uintptr_t retaddr)
{
S390CPU *cpu = S390_CPU(cs);
CPUS390XState *env = &cpu->env;
if (retaddr) {
cpu_restore_state(cs, retaddr);
}
program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER);
}
#endif /* CONFIG_USER_ONLY */